- In this movie, I'm going to explain how…to solve an equation.…In other words, how to use math…to find a number that we don't know yet.…So you probably remember these from school,…I'll give you an example, the typical equation.…So if you look at this equation,…we have a few different things going on.…Our ultimate goal, really, is to isolate x.…We want to end up with something…that looks like x equals a number,…so we know what x is.…To isolate x, basically, we're going to have…to do the same thing to both sides of the equation.…
So we don't change numbers, just on a whim.…So, remember, order of operations matter.…Remember PEMDAS, so, we want to look around…we don't see any parentheses, we don't see any exponents,…but we do see multiplication and division.…And the first thing I'm going to deal…with is the division, I see that I have…3x plus two divided by four.…So I'm going to multiply both sides…of the equation by four, because it's…the opposite of dividing by four.…So remember the tip, if you have a fraction…in a math problem, just write everything as a fraction.…
- Practicing mental math
- Understanding decimals and fractions
- Working with percentages and ratios
- Solving equations
- Calculating area and volume
- Scaling recipes
- Estimating your running speed
- Calculating the area for home-improvement projects
- Working with probability
Skill Level Intermediate
1. Math Foundations: Part one
2. Math Foundations: Part Two
3. Math Foundations: Part Three
4. Shopping and Cooking Math
5. Health and Fitness Math
6. Home-Improvement Math
7. Probability and Counting Math
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